The application of moist heat is a commonly prescribed therapy in medical practice today, and the Thermophore Hot Pack is the method physicians' recommend most often. Moist heat increases circulation and speeds recovery by bringing in fresh blood cells and taking away the wastes, which may hinder healing. These beneficial results continue for several hours after treatment.

The application of moist heat, known as fomentation, is especially useful in treating back pain caused by muscle spasms from strain and tension. The Thermophore Hot Pack, and rest, will gradually relax the muscle in spasm, restoring its normal length and relieving pain. The moisture produced by the Thermophore Hot Pack transfers the high heat deeper into tissues than an ordinary dry heat pad.

Arthritic and rheumatic pain is often temporarily relieved with the use of moist heat. The increased blood flow can relieve the inflamed joints and help maintain flexibility.

The Thermophore Hot Pack produces moist heat automatically by drawing moisture from humidity in the air and retaining it in the hot pack's outer fleece blend cover. The rapid heat rise occurring when the hot pack is turned on forces the moisture out of the fleece blend onto the patient's skin, speeding temporary relief to the treated area.